A group of Indonesian MPs have drawn up a letter opposing the possible release of Schapelle Corby, ahead of her parole decision due later today.

Indonesia's justice minister, Amir Syamsuddin, is set to hold a press conference in Jakarta at 6:30pm (AEDT) where he will talk about 1,700 prisoner applications he has been reviewing, including Corby's.

The former Gold Coast beauty student was jailed in Bali in 2005 after authorities found 4.1 kilograms of marijuana in her bodyboard bag at Denpasar airport the year before.

Mr Syamsuddin says Corby will not be given special treatment.

He told Indonesia's parliamentary committee in charge of legal affairs, known as Commission Three, that a decision will be made based on Indonesian law.

"We want you to understand that everyone has rights under that law, it is not given out of the generosity of a minister, generosity of a president, or anyone's generosity," he said.

"It is given based on the requirements under that law."

Eight parliamentarians from different parties also made their point to Commission Three and the justice minister, reading out a simple, handwritten letter opposing Corby's release.

Taslim Chaniago from one of the country's nationalist and religious parties says the government is being soft on people involved in the drug trade.

"We regret the government's inconsistency in the eradication of the drug trade and distribution, where the political decision doesn't support the law enforcement," he said.

Mr Chaniago says drug offences are one of the country's most serious crimes and there should be no leniency.

"Many Indonesians will be disappointed because drugs are something we fight against together and it's the enemy of Indonesian people," he said.

"There are more or less four million people involved in drug abuse and that's quite a lot."

Indonesia's government faces some backlash if it gives parole to the Australian drug smuggler.

A growing drug trade is one of the country's main concerns.

But protests are not likely to be as strong as in 2012, when president Susilo Bambang Yudhoyono slashed five years off Corby's sentence.

A former Indonesian justice minister, Yusril Ihza Mahendra, was part of the group that challenged the president's clemency decision in court but was told that presidential decisions are above the court's jurisdiction.